کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
579754 877826 2011 9 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Optimization of polyhydroxybutyrate (PHB) production by excess activated sludge and microbial community analysis
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی بهداشت و امنیت شیمی
پیش نمایش صفحه اول مقاله
Optimization of polyhydroxybutyrate (PHB) production by excess activated sludge and microbial community analysis
چکیده انگلیسی
In this study, a high value-added and biodegradable thermoplastic, polyhydroxybutyrate (PHB), was produced by excess activated sludge. The effects of the nutritional condition, aeration mode, sodium acetate concentration and initial pH value on PHB accumulation in the activated sludge were investigated. The maximum PHB content and PHB yield of 67.0% (dry cell weight) and 0.740 gCOD gCOD−1 (COD: chemical oxygen demand), respectively, were attained by the sludge in the presence of 6.0 g L−1 sodium acetate, with an initial pH value of 7.0 and intermittent aeration. The analysis of the polymerase chain reaction (PCR)-denaturing gradient-gel-electrophoresis (DGGE) sequencing indicated that the microbial community of the sludge was significantly different during the process of PHB accumulation. Three PHB-accumulating microorganisms, which were affiliated with the Thauera, Dechloromonas and Competibacter lineages, were found in the excess activated sludge under different operating conditions for PHB accumulation.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Hazardous Materials - Volume 185, Issue 1, 15 January 2011, Pages 8-16
نویسندگان
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